What he said ^^^^. If it was built with no central heat and air there are probably dedicated circuits for window A/C units. My house is also brick and built in the mid 60's. The previous owner had central HVAC installed and now I have three windows in the house with higher than normal (off the floor) outlets next to them for the old units. Each one on its own circuit.
I see one plug that is higher then the rest and its in the kitchen but has not plug in it just a cover plate on it.


